Contraction is this nation's latest spelling word. It's the talk of Major League Baseball and soon fourth graders everywhere will be forced to learn the word. Our oldest daughter, Becca, is in fourth ...
Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback